Hoisting mechanism.



PATENTED MAY 24, 1904.

P MULLEN HOISTING MECHANISM. APPLIOATION rmm m 20 1904 N0 MODEL.

WITNESSES:

l TTOIPIIEY.

' UNITED STATES Patented May 24, 1904.

PATENT OFFICE.

PETER MULLEN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HOISTING MECHANISM.

SPECIFICATION forming part of Letters Patent N 0. 760,908, dated May 24, 1904. Application filed January 28, 1904. Serial No. 190,943. (No model.)

To all whom it may concern:

Be it known that I, PETER MULLEN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain Improvements in Hoisting Mechanism, of which the following is a specification. V

This invention relates to mechanism designed to provide an improved hoist-support, chain-guard, and sheave-stripper.

In the accompanying drawings, Figure 1 represents a side elevation of a hoist embodying the improvements, parts being broken away. Fig. 2 represents a rear elevation of the mechanism shown in Fig. 1, parts being shown in section. Fig. 3 represents a front elevation; and Fig. 4 represents a side elevation of the combined hanger, guard, and stripper.

As shown in the drawings, the hangers 1 are carried by the cross-bar 2, fixed to the hook 3 and carry the hoisting mechanism by engaging the projecting hubs t of the casing 5,separable on the line 6, the hangers having therein the apertures 7, which are sleeved on the hubs 4 and clamp them together to form bearings for the journals 8, having the sheaves 9 fixed thereto.

The casing 5, clamped together by the hangers or cheek-pieces 1, has fixed thereon the bosses 10, which engage the notches or seats 11 of the hangers to hold their support 2 substantially in the plane of the lifting-sections of the chains 12 for carrying the load and substantially in the line of the center of gravity of the hoist.

Projecting from the hangers or cheek-pieces are the guard-plates 13, which extend across the peripheries of the respective sheaves 9, so as to prevent the chains 12 from jumping, the guards conforming to the sheave peripheries.

Projecting from the lower parts of the respective hangers are the brackets 14, having fixed thereto the plates 15, whose upwardly- -projecting ends lie in the channels 16, formed in the concave peripheries of the sheaves 9, to strip or disengage the chains 12 therefrom in case they fail to properly leave their sheaves in winding off.

In constructions heretofore employed ithas been found necessary to make the chain-links of greater length than the sheave-sprockets to cause the chain to freely separate from the sheave in winding and prevent it from climbing; but such arrangement provides play which causes a slipping and jerking action, which is objectionable. By my improvements there is provided a simple and cheap construction permitting the use of chain links which fit the sheave-sprockets and obviates this objectionable slipping and jerking, as the guards prevent the chain from climbing and the stripper insures its separation from the sheave.

Having described my invention, I claim 1. In mechanism of the class described, a sheave, a bearing for said sheave, a hanger sleeved on and supporting said bearing, and a guard-plate carried by said hanger and adapted to hold a chain on said sheave, substantially as specified.

2. In a machine of the class described, a sheave having a concave periphery and a channel therein, abearing for said sheave, ahanger for supporting said bearing, and a stripper supported by said hanger and extending into the peripheral channel of said sheave, substantially as specified.

3. In mechanism of the class described, a cheek-piece having a guard piece projecting transversely from the face thereof and a stripping-piece extending parallel to the face thereof, substantially as specified.

4. In mechanism of the class described, a cheek-piece having an aperture therein, a guardpiece on said cheek-piece projecting transversely from the face thereof, a strippingpiece carried by said cheek-piece and having an end extending parallel to the face thereof, and a seat in said cheek-piece, substantially as specified.

In testimony'whereof I have hereunto set my hand, this 27th day of January, A. D. 1904, in the presence of the subscribing witnesses.

PETER MULLEN.

In presence of JOHN THIEL, UTLEY E. CRANE, Jr. 

